Month: February 2023

Characterization of Warmed-Over Flavor Compounds in Surimi Gel Made from Silver Carp (Hypophthalmichthys molitrix) by Gas Chromatography-Ion Mobility Spectrometry, Aroma Extract Dilution Analysis, Aroma Recombination, and Omission Studies was written by An, Yueqi;Wen, Li;Li, Wenrong;Zhang, Xuezhen;Hu, Yang;Xiong, Shanbai. And the article was included in Journal of Agricultural and Food Chemistry in 2022.Recommanded Product: 706-14-9 This article mentions the following:

The warmed-over flavor (WOF) in surimi gels was characterized by gas chromatog.-ion mobility spectrometry, aroma extract dilution anal., aroma recombination, and omission studies. Surimi gels with different WOF levels were prepared by different gelling temperatures, and surimi gels heated at 90, 100, and 121°C were considered as the samples with light, strong, and medium WOF, resp. Based on the quantification and odor activity values, 14 aldehydes, 2 ketones, 3 alcs., 2 benzene-containing compounds, 2 N-containing compounds, 3 S-containing compounds, 3 lactones, undecanoic acid, and 4-methylphenol were recombined to build a spiked model for surimi gels with the strongest WOF, which showed the highest similarity with the original sample. Finally, a triangle test involving omission of the aroma compounds from the spiked model proved that the WOF in surimi gels was attributed to (E,E)-2,4-decadienal, heptanal, octanal, nonanal, decanal, (E)-2-nonenal, (E)-2-octenal, (E)-2-decenal, (E,E)-2,4-heptadienal, 2,3-pentanedione, 2,6-dimethylpyrazine, 2-propylpyridine, benzothiazole, 2-methoxybenzenethiol, and 2-furfurylthiol. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9Recommanded Product: 706-14-9).

5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Recommanded Product: 706-14-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

A simple and facile method for the synthesis of 1-octacosanol was written by Kunkuma, Vijaya Lakshmi;Kaki, Shiva Shanker;Rao, Bhamidipati V. S. K.;Prasad, Rachapudi B. N.;Prabhavathi Devi, Bethala L. A.. And the article was included in European Journal of Lipid Science and Technology in 2013.Application of 106-79-6 This article mentions the following:

An efficient synthetic method was developed for the preparation of 1-octacosanol (C₂₈-alc., long-chain aliphatic alc., higher alc.) (I) from com. available lipid-based intermediates namely sebacic acid (decanedioic acid) and stearyl alc. (1-octadecanol). The key step in the synthesis was a Wittig reaction. This product on simultaneous hydrogenation of double bond and deprotection of tert-butyldimethylsilyl protecting group in a single step on treatment with Pd/C and H₂ in methanol at ambient temperature resulted octacosanol in 95% yields. The products were characterized by IR, ¹H NMR, and GC-MS anal. The synthesis of the target compound was achieved by a Wittig reaction of (octadecyl)triphenylphosphonium bromide with 10-[[(1,1-dimethylethyl)dimethylsilyl]oxy]decanal, formation of an alkene and subsequent reduction In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Application of 106-79-6).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Application of 106-79-6

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Two-Phase Electrocoagulation of Perfumes and the Analytical Approach for Investigation of the Odor-Active Compound Changes was written by Thaveesangsakulthai, Isaya;Nhujak, Thumnoon;Kulsing, Chadin. And the article was included in ChemistrySelect in 2022.Quality Control of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate This article mentions the following:

In this study, a 2-phase electrocoagulation (EC) system has been applied to treat odor active compounds in perfume extracts The system employed an electrochem. cell using two aluminum electrodes and 2-phase electrolyte containing hexane, NaCl(aq) and the perfume compounds This approach allowed electrochem. reaction of the compounds with the subsequent changes of their profiles in the extracts The volatile compounds in the samples before and after 2-phase EC sampled at different parts of the system were tentatively identified by using solid phase micro extraction (SPME) and gas chromatog. hyphenated with mass spectrometry (GC-MS). The results revealed different types and amounts of the odor active compounds in the samples after the 2-phase EC treatment with the enhanced fruity, floral, sweet, green, minty, herbal and citrus smells. The electrochem. oxidation/reduction and esterification/hydrolysis were proposed as the possible reactions. The developed 2-phase EC technique has a potential for application in the area of cost-effective adjustment of essential oil and perfume quality. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Quality Control of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate).

(E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Quality Control of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Antibacterial, anticandidal and antioxidant properties of Tanacetum argenteum (Lam.) Willd. subsp. flabellifolium (Boiss. & Heldr.) grierson was written by Kose, Yavuz Bulent;Lscan, Gokalp;Goger, Fatih;Demirci, Betul;Elmaci, Ceren. And the article was included in Pakistan Journal of Pharmaceutical Sciences in 2017.COA of Formula: C10H20O2 This article mentions the following:

In the present study hydrodistd. essential oil and total methanol extracts of Tanacetum argenteum subsp. flabellifolium have been evaluated for their antimicrobial and antioxidant effects. The chem. composition of the oil and the crude extract were determined by GC/FID, GC/MS and LC/DAD/ESI-MS systems resp. β-thujone (47.1%), α-pinene (19.1%) and α-thujone (10.5%) were the main compounds of the essential oil while the 5-O- eaffeoquuinic acid, 1,5-O-dieafteoquuinic acid. 4,5-O-dicaffeoquuinic acid were identified as flavonoid content of the crude extract The oil and the methanol extract were demonstrated moderate antimicrobial effects (MIC range; 0,062-2,0 mg/mL) against 21 different pathogenic micro organism. Total phenolic content was determined as 63 mg GAE in g extract and the DPPH radical scavenging effect was determined as 0.16 mg/mL (IC₅₀) and TEAC was determined as 0.21mMol. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1COA of Formula: C10H20O2).

Isopentyl 3-methylbutanoate (cas: 659-70-1) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.COA of Formula: C10H20O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Parahydrophobic Surfaces Made of Intrinsically Hydrophilic PProDOT Nanofibers with Branched Alkyl Chains was written by Mortier, Claudio;Darmanin, Thierry;Guittard, Frederic. And the article was included in Advanced Engineering Materials in 2014.HPLC of Formula: 10203-58-4 This article mentions the following:

We report the synthesis of original 3,4-ethylenedioxythiophene (ProDOT) derivatives containing a branched alkyl chain of various sizes and used as monomers for the formation of parahydrophobic (high apparent contact and high sliding angle) nanofibers by electropolymerization In this work, the size of the branched alkyl chain do not have a significant influence on the surface morphol. because the intrinsic hydrophobicity of the polymers is quite the same. Indeed, assemblies of long polymer nanofibers forming micro- and nanoporous structures are obtained for each polymer. These surfaces display also very high adhesion of water droplets. Indeed, the penetration of water droplets inside the surface roughness was important due to the presence of these nanofibrous structures and the intrinsically hydrophilicity of the polymers. Such materials are excellent candidates for biosensors or anti-bioadhesion. In the experiment, the researchers used many compounds, for example, Diethyl isobutylmalonate (cas: 10203-58-4HPLC of Formula: 10203-58-4).

Diethyl isobutylmalonate (cas: 10203-58-4) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.HPLC of Formula: 10203-58-4

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Rhodium-Catalyzed Novel Carbonylative Carbotricyclization of Enediynes was written by Ojima, Iwao;Lee, Seung-Yub. And the article was included in Journal of the American Chemical Society in 2000.Category: esters-buliding-blocks This article mentions the following:

The reaction of dodec-11-ene-1,6-diynes with dimethyl(phenyl)silane in the presence of a rhodium catalyst under ambient carbon monoxide afforded fused 5-7-5-membered tricyclic structures incorporating carbon monoxide. Suitable catalysts were dicarbonyl(acetylacetonato)rhodium, dodecacarbonyl tetrarhodium and tetracarbonyldi-μ-chlorodirhodium. The compounds thus prepared were derivatives of cyclopent[e]azulen-5-one. Also prepared were derivatives of cyclohepta[2,1-c:3,4-c’]difuran and cyclohepta[2,1-c:4,5-c’]dipyrrole. In the experiment, the researchers used many compounds, for example, Diethyl 2-(prop-2-yn-1-yl)malonate (cas: 17920-23-9Category: esters-buliding-blocks).

Diethyl 2-(prop-2-yn-1-yl)malonate (cas: 17920-23-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Category: esters-buliding-blocks

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Chemical composition, anticancer, anti-neuroinflammatory, and antioxidant activities of the essential oil of Patrinia scabiosaefolia was written by Lin, Jing;Cai, Qiao-yan;Xu, Wen;Lin, Jiu-mao;Peng, Jun. And the article was included in Chinese Journal of Integrative Medicine in 2018.Synthetic Route of C10H20O2 This article mentions the following:

Objective: To study the chem. composition, anticancer, anti-neuroinflammatory, and antioxidant activities of the essential oil of Patrinia scabiosaefolia (EO-PS). Methods: Patrinia scabiosaefolia was analyzed by gas chromatog.-mass spectrometry. Eight human carcinoma cell lines, including SGC-7901, AGS, HepG2, HT-29, HCT-8, 5-FU/HCT-8, HeLa, and MDA-MB-231, were assessed by methylthiazolyldiphenyltetrazolium bromide (MTT) assay. Anti-neuroinflammatory activity was assessed by production of interleukin (IL)-1β and IL-6 induced by lipopolysaccharide in BV-2 cells (microglia from mice). The antioxidant activity was evaluated with a 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging assay. Results: Forty-four components, representing 83.919% of the total oil, were identified in the EO-PS. The major constituents were caryophyllene oxide (12.802%), caryophyllene (6.909%), α-caryophyllene (2.927%), β-damascenone (3.435%), calarene (5.621%), and phenol (3.044%). The MTT assay showed that the EO-PS exhibited significant dose-dependent growth inhibition in the 50-200μg/mL dilution range. The EO-PS exhibited a dose-dependent scavenging activity against the DPPH radical, with an half of maximal inhibitory concentration 1.455 mg/mL. Conclusion: The EO-PS possesses a wide range of antitumor, anti-neuroinflammatory and antioxidant activities, suggesting that it may be a good candidate for further investigations of new bioactive substances. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Synthetic Route of C10H20O2).

Isopentyl 3-methylbutanoate (cas: 659-70-1) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Synthetic Route of C10H20O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Click Chemistry-Assisted Synthesis of a β-D-Galactose-Targeted SiO₂@RC Shell-Core Structure as a Nanoplatform for Metal-Based Complex Delivery was written by Xu, Xiuling;Hu, Fan;Shuai, Qi. And the article was included in Inorganic Chemistry in 2018.Formula: C16H22O11 This article mentions the following:

A facile reversed-phase microemulsion method was used to synthesize shell-core nanospheres of SiO₂@RCs (SiO₂-encapsuled rare-earth metal complexes). β-D-Galactose was then grafted onto the surfaces of the nanospheres through the copper(I)-catalyzed azide-alkyne cycloaddition click reaction for targeted delivery. The chem. characteristics and surface profiles of the nanocarriers were investigated by Fourier transform IR spectroscopy, dynamic light scattering, transmission electron microscopy, and SEM. A high-efficiency microwave synthesis method was applied to prepare five complex cores by the reaction of different rare-earth metal salts with two isomeric ligands, o-CPA (2-chlorophenoxyacetic acid) and m-CPA (3-chlorophenoxyacetic acid). The crystal structures of the five synthesized RC cores were confirmed through X-ray diffraction, which revealed the formulas of five RCs, [Dy(o-CPA)₃(H₂O)]·H₂O RC₁, [Ho(o-CPA)₃(H₂O)]·H₂O RC₂, 2[Er(m-CPA)₃(H₂O)]·3H₂O RC₃, 2[Gd(m-CPA)₃(H₂O)]·3H₂O RC₄, and [Ce₂(m-CPA)₆(H₂O)₃]·2H₂O RC₅. An in vitro cell study revealed that all RCs exhibited certain anticancer activities. RC₂, in particular, showed the strongest cytotoxicity against HepG2 cells. The enhanced cell permeability and drug retention considerably improved the cytotoxicity of all SiO₂@RC₂-gal relative to that of RC₂. The selective uptake of the β-D-galactose-conjugated nanospheres by HepG2 cells through mechanisms mediated by cell surface receptors resulted in fewer side effects on extrahepatic tissues. Our contribution provides a novel design concept of a target SiO₂@RCs-gal nanocarrier for delivering affordable antitumor complexes in cancer therapy. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 4163-60-4Formula: C16H22O11).

(2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 4163-60-4) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Formula: C16H22O11

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Comparative analysis of eastern and western drying-oil binding media used in polychromic artworks by pyrolysis-gas chromatography/mass spectrometry under the influence of pigments was written by Wang, Na;He, Ling;Zhao, Xiang;Simon, Stefan. And the article was included in Microchemical Journal in 2015.Product Details of 106-79-6 This article mentions the following:

The mostly used drying-oils as binding media in historical artworks of eastern tung-oil and western linseed-oil, poppy-oil, walnut-oil are comparatively identified by online methylated pyrolysis-gas chromatog./mass spectrometry (Py-GC/MS). Based on the anal. of un-pigmented and pigmented reference samples after treated by natural aging, hydro-thermal aging and UV aging, resp., the characteristic pyrolysis products of all drying-oils are classed into mono-carboxylic acids (C6-8, 14, 16, 18, 20), di-carboxylic acids (2C6-12), glycerol, erythritol, 2-tridecanone, 8-hydroxy-octanoic acid, 3-octyl-oxiraneoctanoic acid and 2,6,10-trimethyl-9-undecenoic acid. Both benzene derivative and 9,10-dihydroxy-octadecanoic acid are suggested as the marked components for distinguishing eastern and western drying-oil. The investigated pigments of malachite, cinnabar, azurite and ochre do not show obvious influence on the detection of characteristic pyrolysis products of drying-oil, but they are proved to accelerate the aging and hydrolyzing rate of drying-oil, especially the pigment of cinnabar. The established online methylated Py-GC/MS procedure and the summarized data have been successfully applied on the identification of raw tung-oil and boiled tung-oil in historical painting samples collected from Drum Tower (Ming Dynasty), Bell Tower (Ming Dynasty), and Thousand-Buddha Cliff Grotto (Tang Dynasty). It is believed that the established Py-GC/MS procedure is able to provide wide application in archeol. research. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Product Details of 106-79-6).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Product Details of 106-79-6

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Expedient synthesis of biologically important sulfonylmethyl pyrimidines was written by Blades, Kevin;Demeritt, Julie;Fillery, Shaun;Foote, Kevin M.;Greenwood, Ryan;Gregson, Clare;Hassall, Lorraine A.;McGuire, Thomas M.;Pike, Kurt G.;Williams, Emma. And the article was included in Tetrahedron Letters in 2014.Safety of Methyl 2-(methylsulfonyl)acetate This article mentions the following:

Two novel synthetic strategies that allow rapid diversification of the sulfone moiety in sulfonylmethyl pyrimidines, a class of compounds with a wide range of biol. activity, which are of interest in a wide variety of drug discovery programs, are described. In the experiment, the researchers used many compounds, for example, Methyl 2-(methylsulfonyl)acetate (cas: 62020-09-1Safety of Methyl 2-(methylsulfonyl)acetate).

Methyl 2-(methylsulfonyl)acetate (cas: 62020-09-1) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Safety of Methyl 2-(methylsulfonyl)acetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics